Laravel Prometheus Exporter

A prometheus exporter package for Laravel and Lumen.

This package is a wrapper bridging promphp/prometheus_client_php into Laravel and Lumen.

However, This package get inspire from another package below

• Superbalist/laravel-prometheus-exporter
• arquivei/laravel-prometheus-exporter
• triadev/LaravelPrometheusExporter

Feel free to use above package instead, because this package just try to cover compatibility for previous version of Laravel and Lumen such as 6.x to 8.x, etc.

Installation

Install the package via composer

composer require altelma/laravel-prometheus-exporter

If you are using Lumen need to register the service provider in bootstrap/app.php

$app->register(Altelma\LaravelPrometheusExporter\PrometheusServiceProvider::class);

Configuration

The package has a default configuration which uses the following environment variables.

PROMETHEUS_NAMESPACE=app

PROMETHEUS_METRICS_ROUTE_ENABLED=true
PROMETHEUS_METRICS_ROUTE_PATH=metrics
PROMETHEUS_METRICS_ROUTE_MIDDLEWARE=null
PROMETHEUS_COLLECT_FULL_SQL_QUERY=true
PROMETHEUS_STORAGE_ADAPTER=memory

PROMETHEUS_REDIS_HOST=localhost
PROMETHEUS_REDIS_PORT=6379
PROMETHEUS_REDIS_TIMEOUT=0.1
PROMETHEUS_REDIS_READ_TIMEOUT=10
PROMETHEUS_REDIS_PERSISTENT_CONNECTIONS=0
PROMETHEUS_REDIS_PREFIX=PROMETHEUS_

Metrics with multiple pods in k8s

If you want to expose metrics endpoint with application that running in k8s. It needs to store the same information with a single endpoint. So you need to add config like below

PROMETHEUS_REDIS_NAME="<your_custom_name>"

You need to ensure config set like this and this support Redis adapter only

PROMETHEUS_REDIS_PREFIX_DYNAMIC=true
PROMETHEUS_REDIS_PREFIX=<your_prefix_name>
PROMETHEUS_REDIS_NAME="<your_custom_name>"

Metrics

The package allows you to observe metrics on the application routes. Metrics on request method, request path and status code.

Laravel

In order to observe metrics in Laravel application routes (the time between a request and response), you should register the following middleware in your application's app/Http/Kernel.php:

protected $middleware = [
    \Altelma\LaravelPrometheusExporter\Middleware\PrometheusLaravelMiddleware::class,
];

Lumen 9.x

In order to observe metrics in Lumen application routes (the time between a request and response), you should register the following middleware in your application's bootstrap/app.php:

$app->middleware([
    \Altelma\LaravelPrometheusExporter\Middleware\PrometheusLumenMiddleware::class,
]);

Lumen 8.x and Lower

In Lumen 8.x and lower, cannot get route in global middleware just need to do in route middleware instead

$app->routeMiddleware([
    'http.prometheus' => \Altelma\LaravelPrometheusExporter\Middleware\PrometheusLumenRouteMiddleware::class,
]);

Protect metrics endpoint

If you need to prevent someone see your routes in /metrics you can add middleware to protect your endpoint. Now we start to support only basic_auth to protect you metrics endpoint

PROMETHEUS_METRICS_ROUTE_AUTH_ENABLED=true
PROMETHEUS_METRICS_ROUTE_AUTH_USERNAME=<basic_auth_username>
PROMETHEUS_METRICS_ROUTE_AUTH_PASSWORD=<basic_auth_password>

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Bug Report

This package is not perfect right, but can be improve together. If you found bug or have any suggestion. Send that to me or new issue. Thank you to use it.